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Troubleshooting
ProblemProblem
Problem
CauseCause
Cause
SolutionSolution
Solution
The pot does not have a sufcient
amount of abrasive.
See Relling the Pot with Abrasive, page
18.
The system is not properly set up.
See Setting Up the Equipment, page 11.
Make sure the pot pressure is properly
set. The pot pressure must be set 30
psi above the blast pressure. Make sure
the selector valve is set to BLAST. The
abrasive ball valve must be open. The
abrasive metering valve must be at least
1/8 turn open.
There is an obstruction in the
media circuit.
See Flushing the Diaphragm Valve, page
29.
The diaphragm valve is not
working.
See Repairing the Diaphragm Valve,
page 30.
No abrasive ows from the
nozzle during blast mode.
There is blockage inside the pot or
inside the abrasive hose between
the pot and the panel.
Make sure the ball valve is closed, then
disconnect the cam-lock coupler. Open
the abrasive ball valve slightly and make
sure abrasive is owing form the abrasive
hose. If not, follow the shut down
procedure (see Shutting Down, page 19).
Thoroughly ush the pot and the media
hose after draining media and water.
The blast regulator is not adjusted
to the correct pressure.
Adjust the blast regulator to the desired
pressure while the blast control is
engaged.
The tubing from the main
air regulator is not properly
connected.
Conrm that the tubing from the blast
regulator to the main air regulator is
intact. See Hose Schematic, page 42.
The blast air regulator is
malfunctioning.
Replace the blast air regulator (Kit
17C625).
No blast air ow when the
blast control is engaged.
The water pump cycles
while the blast control
engaged.
The main air regulator is
malfunctioning.
See Repairing the Main Air Regulator,
page 28 (EQ600 – Kit 17C131, EQ300
– Kit 17C129).
The air supply is inadequate. Make sure the air inlet pressure gauge
reads 100-125 psi. If the gauge does
not read 100–125 psi, check the air
compressor for proper setup.
The Emergency Stop is engaged. Disengage the Emergency Stop.
The electric blast control circuit is
malfunctioning.
Inspect the hose cable for damaged or
shorted wiring. Check the battery and
control panel connections. Make sure the
DC power source is 12V. Check the 3A
fuse inside the control panel, and replace
it if necessary. Check the current ow in
the circuit. If current exists, replace the
relay (EQ5179).
No blast air ow when the
blast control is engaged.
The water pump doesdoes
does
notnot
not
cycle while the blast control
engaged.
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